Ineed on this i don't know how u do it can someone show me how?

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

Data are collected to see how many ice-cream cones are sold at a ballpark in a week. day 1 is sunday and day 7 is the following saturday. use the data from the table to create a scatter plot.

Evaluate 3(a + b + c)squared for a = 2, b = 3, and c = 4. a. 54 b. 243 c.729 add solution .